Magnetic ore-separator.



No. 812,173. PATENTED FEB. 6, 1906.

G. GRUNDAL. MAGNETIC 0m: SBPARATOR.

APPLICATION FILED APR.'I, 1905.

WlTNESSES 4ZJA6M ATTORNEYS 1 filed November UNITED sTArias PflENT OFFICE; I

Original application filed November 3, 1904, Serial No.

Specification of Letters Patent.

231,238. Divided and this application filed April 7, 1905. Serial No. 254,298.

Patented Feb. 6, 1906.

To all whom it may concern:

Be it known that I, GUSTAF GRoNnAL, a subject of the Kin of Sweden and Norway, and a resident of jursholm, Sweden, have invented a new and useful Improved Magnetic Ore-Separator, of which thefollowing is a specification.

The present invention refers to a magnetic ore-separator of the kind in which powdered oresuitable for magnetic separation, particu-. larly magnetic iron ore suspended in water, is led horizontally past the pole-piece of an electromagnet of such a power that it will pull the pure ore particles out of the stream of water, while the less pure particles gather close beneath the surface of the water and are carried away alone separately from the dead-powder, which sinks down and is allowed to flow away. I

My present invention is an improvement on the apparatus formin the subject of my application for patent, gerial N 0. 180,904, 2, 1903, and, like that apparatus, is adapte forming the subject of my a patent, Serial No. 235,394, file 1904.

On the accompanying drawings there is shown a form of apparatus as an example.

Figure 1 represents a vertical longitudinal section of the a paratus, and Fig. 2 represents a part of the apparatus in a section on line22ofFig.l

The apparatus consists of a cylindricalelectromagnet having double walls A and B, connected with each other at the top, and the winding 0, arranged between the walls. The conducting-wires enter and issue at D. The walls A and B extend downward beyond the winding C and end in tapering edges which form two concentric poleieces E F. The electromagnet is u porte on arms G, projecting from a-vaufted cover H, resting on' the hollow frame I, which is funnel-shaped at the top. In the funnel-shaped portion of the frame there are two funnel-shaped vessels J K, fixed to the frame and arrangedconcentrically one within the other. The outer vessel K communicates, by means of a hollow arm L and a hole M in the wall of the frame,

lication for ecember 3,

. with a pipe N, provided with a regulating.

cock 0 outside the frame. The inner vessel J communicates, by means of a hollow arm I. and a hole Q in the wall of the frame, with X is caused to rotate. for carrying out the process a dischar e-tube R and is adjustably screwed into themner upward-directed mouth S of the hollow arm P. Round the vessel K there is a trou h-shaped chamber T. The outer wall U 0 said chamber is higher than the outer wall of the vessel K. With the chamber T there is connected a-sup'plypipe V.

Beneath the pole-pieces E and F there is a disk X, fixed to a vertical shaft Y, mounted in bearings inside the cylindrical electrom'agnet, a sufficiently-rapid rotation being imarted to the shaft by any suitable means. indicates the lowerend of a drivin -shaft.

The oiperation of the apparatus is as follows: A er closing the va ve O the water, with the suspended ore powder, is led in through the tube Vinto' the chamber T, and after having risen to the brim of the funnel K it flows into said funnel. After thefunnel K has been filled the stream asses to the funnel J and from it out throng the conduit P R. The electromagnetis now excited and the disk By regulating the supply through the tube of the. valve 0 the suitable speed of the stream of suspended material flowingover the brim of the funnel K may be obtained so that the magnet has time to pull away the most V and the position,

magnetic particles and to cause the less magnetlc' articles to follow the stream into 'the funne 'J to be discharged through the conduit P R to be further enriched and giving the dead particles time to sink down in the funnel K, from which they flow off through the conduit L N. The particles that are pulled out of the water and against the rapldly-rotating disk X are immediately flun away toward the sides-against the vault and fall down in the interior ofthe frame I, from the lower part of moved. By lifting or lowering the funnel J the depth of the stream of sus ended mate rial flowing over the edge may e regulated.

It is not necessary that the vessels beneath the magnet should be'funnel-shaped. They may have any other suitable form, if desired.

1 claim ,1. A magneticseparator for powdered ore suspended in water, comprising an upright cyhndrical electromagnet having its polepieces directed downward in the shape of concentric rings, beneath said pole-pieces a rapidly-rotating disk mounted on a vertical shaft and beneath said disk two annular veswhich they, are resels concentric to each other, an inlet for the fluid to the outer vessel and an adjustable discharge at the bottom of the inner vessel, the space inside said inner annular vessel being provided with an outlet for the fluid.

2. A magnetic separator for powdered ore suspended in Water, comprisinganupright cylindrical electromagnet having its polepieces directed downward in the shape of concentric rings, beneath said pole-pieces a rapidly-rotating disk mounted on a vertical shaft and beneath said disk two annular vessels concentric to each other, an inlet for the slaves fluid to theouter vessel and an adjustable discharge at the bottom of the inner vessel, the space inside said inner annular vessel being' provided with an outlet for the fluid, and a collection vessel surrounding the circumference oft e disk.

In testimony whereof I have signed my name to this specification inthe presence of two subscribing witnesses.

GUSTAF GRQNDAL.

Witnesses:

FREDRIK L. ENQUIST, A. HELJEsTRAND. 

